A person who busts it up sexually with big girls or guys
Dave: See the size of that thing Steve went home with last night? T'was towing it's own hotdog stand for crying out loud!
Mike: Doesn't surprise me TBH, he's a tubber, said sommat about liking the challenge of finding the hole.
After wrestling the chubby lump to the floor 'Trevor the Tubber' flipped fat Freddy over and slipped his little weener into his brown eye